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RENEWABLES FOR HEATING AND COOLING

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RENEWABLES FOR HEATING AND COOLING ( renewables-for-heating-and-cooling )

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In 2005, Iceland used 27.7 PJ40 of direct geothermal heat mainly for space heating (19.9 PJ) but also for swimming pool heating (1.3 PJ), industry (1.6 PJ), greenhouse heating 1.0 PJ, fish farming (2.0 PJ) and for melting snow (1.3 PJ) (Orkustofnun, 2006a) (Figure 54). A further 2-3PJ of high-temperature heat was used for power generation. Because there is sufficient, low-cost geothermal water for space heating there has been a limited market for GHPs with only three locations reported. The main geothermal activity in recent years has been invested in the exploitation of high-temperature resources, usually for the production of electricity. Iceland has an outstanding natural endowment of geothermal resource which has been heavily exploited for heating and more recently for the production of electricity. Although largely market led, particularly since the oil price shocks of the 1970s, the government encouraged resource use by supporting investments in exploitation and technological developments. The combination of an abundant natural resource and long term R&D support has made geothermal heat cost-competitive and hence more widely utilized. 105 40. PJ heat values were calculated from heat use percentages and total heat demand as reported by Orkustofnun (2006a).

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